Headphones



FIG. 1 is a front perspective view of headphones showing the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is an enlarged view of a portion of FIG. 2; and,

FIG. 9 is an enlarged view of a portion of FIG. 3. 

CLAIM The ornamental design for headphones, as shown and described. 